Recently a routine police patrol parked outside a LafayetteStreet tavern. After last call, the officer noticed a manleaving the bar so intoxicated that he could barely walk.The man stumbled around the street for a few minutes, withthe officer quietly observing. After what seemed an eternityand trying his keys on five vehicles, the man managed tofind his car, which he fell into. He was there for a fewminutes as a number of other patrons left the bar and droveoff.

Finally the man started the car, switched the wipers on andoff (it was a fine dry night), flicked the blinkers on andoff, honked the horn, and then switched on the lights. Hemoved the vehicle forward a few inches, reversed a little,and then remained still for a few more minutes as some morevehicles left. At last he pulled out of the parking lot andstarted to drive slowly down the road.

The police officer, having patiently waited all this time,now started up the patrol car, put on the flashing lights,promptly pulled the man over, and carried out a breathalyzertest. To his amazement, the breathalyzer indicated noevidence of the man having consumed alcohol at all!Dumbfounded, the officer said, "I'll have to ask you toaccompany me to the police station. This breathalyzerequipment must be broken."